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27. You _____her the news, for she knew it already.

A. mustn’t have told  B. can’t have told   C. mightn’t have told  D. needn’t have told

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26.____Are you satisfied with what he has done?

  ____ Not  in  the least. It couldn’t have been ______.

A. so bad    B. better     C. worse      D. the  worst

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25. After a long journey, my legs ______under me  and I couldn’t walk any farther.

A. gave up    B. gave out    C. gave in      D. gave away

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24.The fact that people are afraid to go out at night is often a result of perceived( 感 知 )danger _____actual danger.

A. other than   B. more than    C. rather than     D. better than

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23. The naughty boy! He ____where he leaves his thing.

A.   always forgets         B. will always forget 

C. is always forgetting        D. has always forgotten

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22.--You are always full of ____. Can you tell me the secret?

  --Taking plenty of exercise every day.

A. power     B. strength    C. force       D. energy

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第一节  单项填空(共15小题)

21.As ____unemployment is very high nowadays, it’s very difficult for people to find ____ work.

A. the; 不填     B. the; a     C.不填; 不填    D. an; the

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31.(22分)

Ⅰ、科学家将分离得到的成熟的胡萝卜韧皮部细胞进行培养,由几个细胞发育成完整的新植株,据图回答:

(1)    这种生殖方式属于__________。所用的技术是____________。

(2)    分离出来的胡萝卜根细胞成为细胞团是通过 ________分裂来完成。

(3)    实验说明植物细胞具有_____________。

Ⅱ、如图表示正常女性与一个患血友病(用字母H  h)男性结婚,通过减数分裂产生配子,精子H与卵细胞F结合形成的受精卵发育成为一个患血友病男孩的过程,据图回答:

(1)    图中A、D F的名称依次是__________ 、­­­_____________  、_____________。

(2)    图中F、H细胞的染色体组成依次是__________、 __________。

(3)    若G与F结合,则后代的基因型是______,表现型是___________­­­­­。

高三第一学期期末考试

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